Return mechanism for moving parts of machinery.



B. MENKIN.

RETURN MECHANISM FOR MOVING PARTS OF MACHINERY, APPLICATION FILED OCT. 1. 1913. RENEWED FEB. 4.1915.

I 1 151, 21 1. Patented Aug. 24, 1915.

COLUMBIA PLANDGRAPH cm, WASHING c.

IIIT .1

BURNETT MENKIN, OF NEW YORK, N. Y.

RETURN MECHANISlVI MOVING PARTS OF MACHINERY.

Specification of Letters Patent.

Patented Au 24, 1915.

Application'filed October 1, 1913, Serial No. 792,815. Renewed February 4, 1915. Serial No. 6,169.

T all whom it may concern Be it known that I, BURNETT MENKIN,

a citizen of the United States, and resident of New York city, in the county of Bronx and State of New York, have invented certain new and useful Return Mechanism for Moving Parts of Machinery, of which the following is a specification.

My invention relates to return mechanism for moving parts of machinery, and has for its object to greatly simplify the construction of such parts so as to secure economy in cost, while at the same time to obtain a considerably greater efiiciency in operation, as well as increased durability. I accomplish these objects by the construction and arrangement of parts hereinafter set forth.

In the present application I have illustrated my invention as applied to a die, and in the accompanying drawings, which form a part of this specification, and in which similar letters of reference refer to corresponding parts wherever they occur, I show so much only of a die press as is necessary to illustrate my invention, it being understood that unless otherwise indicated its parts are of the usual approved construction.

In the drawings :Figure 1 is a front elevation of a die and parts connected therewith showing my invention. I show in full lines the parts in their normal position, and in dotted lines the positions these parts assume when the knockout has been actuated by arms, as F, F or other actuating parts. Fig. 2 is a side elevation of a die with my invention applied thereto; and, Fig. 3 is a do tail cross-sectional view-of the die body and knockout.

Heretofore in constructing dies it has been usual to place the spring for the knockout in the inside of the die body. This has resulted in the following consequences First, in causing the die body to be made sufficiently large in size to receive such a spring, and to provide room sufiicient for its movements; also in making the walls of the die body much thinner and weaker than they would otherwise be. employment of a comparatively small and weak spring which was easily and quickly broken necessitating frequent renewals and replacements, and stoppage of the die press for this purpose.

One of the principal objects of my invention is to so construct the parts that the Second, in the f knockout spring may be placed on the outside of the die body, thereby allowing a greatly reduced. size of the die body and permitting the walls thereof to be made much thicker and stronger, and also reducing the cost of construction, the more particularly as this method obviates all necespermit of replacements and renewals with ease and without serious loss of time.

In the drawings the letter A indicates the die body, B the knockout, and C a cutter,

which may be secured to the die body by the set screws 0. c or by providing the die body and cutter with screw -threads and screwing them together. The die body and cutter may be of any usual or desired shape, material or construction.

The knock-out B is of the usual construction, and has a head Z), and plunger Z2 and works in a runway a formed in the die body A. A bar extends through an opening in the head 5, and ends in arms 6 b which project outwardly therefrom through slots a a formed in the sides of the die body. In large dies suitable arms (not shown) may be attached in any usual or desired manner to the head of the knockout, and be used instead of the bar as hereinbefore described.

To the outer surface of the die body A and substantially intermediate of the arms 71 72 1 attach pins D. D which carry rollers (Z. (Z and upon these rollers I place a long endless coiled spring E, which passes over the rollers d. (P and under the arms 6 b in such manner that as the knockout is depressed the arms b 72 will put a tension on the spring E, so that the latter acting on the knockout through the arms 5 b will cause the knock-out to return to its normal position in the die body whenever pressure is removed from the said arms 6 6 Upon the ram of the press or some other convenient place I arrange contact members such as the two arms F. F in such manner that the arms 6 b will strike them on each up stroke of the press, and when this occurs the said arms will actuate the knockout to cause it to dislodge the finished work from the cutter C, the spring E bringing the knockout back to normal position as soon as the arms 6 b are moved out of engagement with the arms F. F

While I have described my inventiongeous for use in other constructions of a similar character where one member is to be vmoved and then brought backinto normal position with relation to another number.

What I claim as new and desire to secure by Letters Patent is 1- 1. An 'outerbod'y member, an inner movable member working longitudinally with relation thereto, and an endless coiledspring encircling said outer body member and'acting upon said inner movable member to retract the same whenever it has been moved out of its normal pos1-t1on. 1

2. 'An outer body memberyan :innenmovable member working longitudinally with relation thereto, andv an endless coiled spring encircling said members and arranged to retract said inner movable memberwhenever it has been :moved out of its normal position.

3. Anouter body member, holding-means thereon, an inner member movable longitudinally with respect to said body member,

and an endless coiled springembracing said members and engaging said holding means, and adapted to retract said movable mem- :ber.

4. An outer'body member, holding means thereon, an inner ilongitudinall-y movable member-having actuating parts, and an endless coiled spring engaging said a holding means and parts, and adapted to retract said movable vmember. I

5. An outer body member, an inner-longitudinally movable member having, actuating parts thereon, holding means on said body member placed intermediate of said parts, and a coiled spring embracing said membersandengaging said holding means and parts, andiadapted to retract said movable member when .thesame hasbeen moved. 6. An outerbody member havingan-internal bearing, aninner longitudinally movable member working, in saidbearing and having actuating:- parts, and an endless coiled, spring embracing said parts and members and acting upon said parts to retract said'movable member. 7

7. A body member, a, movable member working in said body member provided with actuating parts, holding members provided with rollers upon said body member, and an endless coiled spring engaging said holding members and actuating parts, for

.less coiled spring engaging :said holding members and :parts for retracting said movable member.

9; An outer body-member having aninterinal bearing, an inner longitudinally, movable member having a head provided with actuating A arms! workingin saidibearing, and

an endless ,coiled' spring embracing! said members andwactingvupon said arms to retract said .movablemember. 1

vmember, and an endlesscoiled spring arranged on s'aidbody memberiand engaging said, parts to retract said inner: member.

11. A slotted outer -member, amovabie mner member having arms which p'10]Cl3 through the slots of-the: ou'tenmeniben'holding .means ariza'ngedv on said outer member,

and anendless coiled spring icarried by :said

' holding means and engaging saidriarms .to

:retract isald inner-member.

12. A slotted-member, a movable inner member thereinhaving arms which project through @the slots vof theoutermember, holding means arranged on said outer member, and a coiled spring supported-by said holding meanson' the periphery of saidoute-r member and engaging said arms to retract said movable member. c

13. An outermember having slots,- an. in ne'r member havingpa-rt-s proj ecting through said slots, and an endless coiled spring arranged aroundythe periphery of-said outer member and acting upon said parts.

1 Signed at. New 'York; intheeou-nty of Bronx 1 and State -of i-New York this 1 18th day-of SeptemberA. D. 1913.

BURNETT MENKiN.

Witnesses:

WILLIAM Brennan's, Gnoncn Bean RUSSELL.

Copies of thlslpatentlmay be wobtained forfive cents each, by addressing the commissionernfaBatents,

- ,WashingtonrJJ. O." 

